U.S. Air Force Airman 1st Class Demetrius Brown grinds down a drainage pipe on Bagram Airfield, Afghanistan, May 17, 2014. Brown is assigned to the 577th Expeditionary Prime Base Engineer Emergency Force Squadron. U.S. Air Force Airman 1st Class Demetrius Brown grinds down a drainage pipe on Bagram Airfield, Afghanistan, May 17, 2014. Brown is assigned to the 577th Expeditionary Prime Base Engineer Emergency Force Squadron. SHARE: Download: Full Size (2.35 MB) Tags: Photo Essays Credit: VIRIN: 200359-J-GAL53-660.jpg Photo Gallery